# Thread: help please!

1. ## help please!

the reciprocal of 4 plus the reciprocal of 5 is the reciprocal of what number?

please help.
thanks.

2. Originally Posted by heather_meaghan
the reciprocal of 4 plus the reciprocal of 5 is the reciprocal of what number?

please help.
thanks.
let the number be x. then we have

$\frac 14 + \frac 15 = \frac 1x$ now solve for $x$

or you can simply add 1/4 and 1/5 and take the reciprocal of the answer

3. thank you so much!